Improve videos

video/src/routes.ts

@@ -13,6 +13,15 @@ export function dashboardUrl(storyboard: Storyboard): string {
     lon: String(view.lon),
     zoom: String(view.zoom),
   });
+  // Cold-open filters: applied through the URL so the first frame already
+  // shows a filtered map. Numeric features use name:min:max, enums name:a|b.
+  for (const [name, value] of Object.entries(storyboard.content.initialFilters ?? {})) {
+    const entry =
+      typeof value[0] === 'number'
+        ? `${name}:${value[0]}:${value[1]}`
+        : `${name}:${(value as string[]).join('|')}`;
+    params.append('filter', entry);
+  }
   for (const tt of storyboard.content.stubbedTravelTimeFilters) {
     params.append('tt', `${tt.mode}:${tt.slug}:${tt.label}:${tt.min ?? 0}:${tt.max ?? 120}`);
   }